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new font, rewritten PNGU, menu tweaks, optimized text code

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This commit is contained in:
dborth 2010-03-21 19:51:36 +00:00
parent 5166ca2b61
commit c926152762
7 changed files with 490 additions and 592 deletions
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BIN
source/ngc/fonts/font.ttf
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2
source/ngc/gui/gui_filebrowser.cpp
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@ -109,7 +109,7 @@ GuiFileBrowser::GuiFileBrowser(int w, int h)
fileListText[i] = new GuiText(NULL, 20, (GXColor){0, 0, 0, 0xff}); fileListText[i] = new GuiText(NULL, 20, (GXColor){0, 0, 0, 0xff});
fileListText[i]->SetAlignment(ALIGN_LEFT, ALIGN_MIDDLE); fileListText[i]->SetAlignment(ALIGN_LEFT, ALIGN_MIDDLE);
fileListText[i]->SetPosition(5,0); fileListText[i]->SetPosition(5,0);
fileListText[i]->SetMaxWidth(380); fileListText[i]->SetMaxWidth(450);
fileListBg[i] = new GuiImage(bgFileSelectionEntry); fileListBg[i] = new GuiImage(bgFileSelectionEntry);
fileListIcon[i] = NULL; fileListIcon[i] = NULL;

35
source/ngc/gui/gui_imagedata.cpp
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@ -20,40 +20,7 @@ GuiImageData::GuiImageData(const u8 * i)
height = 0; height = 0;
if(i) if(i)
{ data = DecodePNG(i, &width, &height);
PNGUPROP imgProp;
IMGCTX ctx = PNGU_SelectImageFromBuffer(i);
if(!ctx)
return;
int res = PNGU_GetImageProperties(ctx, &imgProp);
if(res == PNGU_OK)
{
int len = (imgProp.imgWidth * imgProp.imgHeight) <<2;
if(len%32) len += (32-len%32);
data = (u8 *)memalign (32, len);
if(data)
{
res = PNGU_DecodeTo4x4RGBA8 (ctx, imgProp.imgWidth, imgProp.imgHeight, data, 255);
if(res == PNGU_OK)
{
width = imgProp.imgWidth;
height = imgProp.imgHeight;
DCFlushRange(data, len);
}
else
{
free(data);
data = NULL;
}
}
}
PNGU_ReleaseImageContext (ctx);
}
} }
/** /**

100
source/ngc/gui/gui_text.cpp
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@ -238,56 +238,17 @@ void GuiText::Draw()
currentSize = newSize; currentSize = newSize;
} }
if(maxWidth > 0) u8 maxChar;
{
char * tmpText = strdup(origText);
u8 maxChar = int((float((maxWidth<<1))) / (float(newSize)));
if(!textDyn) if(maxWidth == 0)
{ {
if(strlen(tmpText) > maxChar) fontSystem[currentSize]->drawText(this->GetLeft(), this->GetTop(), text, c, style);
tmpText[maxChar] = 0; goto done;
textDyn = charToWideChar(tmpText);
} }
if(textScroll == SCROLL_HORIZONTAL) maxChar = int((float((maxWidth<<1))) / (float(newSize))); // approximate
{
int textlen = strlen(origText);
if(textlen > maxChar && (FrameTimer % textScrollDelay == 0)) if(wrap)
{
if(textScrollInitialDelay)
{
--textScrollInitialDelay;
}
else
{
++textScrollPos;
if(textScrollPos > textlen-1)
{
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
}
strncpy(tmpText, &origText[textScrollPos], maxChar-1);
tmpText[maxChar-1] = 0;
int dynlen = strlen(tmpText);
if(dynlen+2 < maxChar)
{
tmpText[dynlen] = ' ';
tmpText[dynlen+1] = ' ';
strncat(&tmpText[dynlen+2], origText, maxChar - dynlen - 2);
}
if(textDyn) delete[] textDyn;
textDyn = charToWideChar(tmpText);
}
}
if(textDyn)
fontSystem[currentSize]->drawText(this->GetLeft(), this->GetTop(), textDyn, c, style);
}
else if(wrap)
{ {
int lineheight = newSize + 6; int lineheight = newSize + 6;
int txtlen = wcslen(text); int txtlen = wcslen(text);
@ -347,16 +308,59 @@ void GuiText::Draw()
fontSystem[currentSize]->drawText(left, top+i*lineheight, textrow[i], c, style); fontSystem[currentSize]->drawText(left, top+i*lineheight, textrow[i], c, style);
delete[] textrow[i]; delete[] textrow[i];
} }
goto done;
}
if(textScroll == SCROLL_HORIZONTAL)
{
char *tmpText = strdup(gettext(origText));
char *tmpText2 = strdup(tmpText);
int textlen = strlen(tmpText);
if(textlen > maxChar && (FrameTimer % textScrollDelay == 0))
{
if(textScrollInitialDelay)
{
--textScrollInitialDelay;
} }
else else
{ {
fontSystem[currentSize]->drawText(this->GetLeft(), this->GetTop(), textDyn, c, style); ++textScrollPos;
if(textScrollPos > textlen-1)
{
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
}
strncpy(tmpText, &tmpText2[textScrollPos], maxChar-1);
tmpText[maxChar-1] = 0;
int dynlen = strlen(tmpText);
if(dynlen+2 < maxChar)
{
tmpText[dynlen] = ' ';
tmpText[dynlen+1] = ' ';
strncat(&tmpText[dynlen+2], tmpText2, maxChar - dynlen - 2);
}
if(textDyn) delete[] textDyn;
textDyn = charToWideChar(tmpText);
}
} }
free(tmpText); free(tmpText);
free(tmpText2);
} }
else
if(!textDyn)
{ {
fontSystem[currentSize]->drawText(this->GetLeft(), this->GetTop(), text, c, style); char *tmpText = strdup(gettext(origText));
if(strlen(tmpText) > maxChar)
tmpText[maxChar] = 0;
textDyn = charToWideChar(tmpText);
free(tmpText);
} }
fontSystem[currentSize]->drawText(this->GetLeft(), this->GetTop(), textDyn, c, style);
done:
this->UpdateEffects(); this->UpdateEffects();
} }

2
source/ngc/menu.cpp
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@ -3472,7 +3472,7 @@ static int MenuSettingsNetwork()
GuiOptionBrowser optionBrowser(552, 248, &options); GuiOptionBrowser optionBrowser(552, 248, &options);
optionBrowser.SetPosition(0, 108); optionBrowser.SetPosition(0, 108);
optionBrowser.SetAlignment(ALIGN_CENTRE, ALIGN_TOP); optionBrowser.SetAlignment(ALIGN_CENTRE, ALIGN_TOP);
optionBrowser.SetCol2Position(275); optionBrowser.SetCol2Position(290);
HaltGui(); HaltGui();
GuiWindow w(screenwidth, screenheight); GuiWindow w(screenwidth, screenheight);

735
source/ngc/pngu.c
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@ -1,31 +1,41 @@
/******************************************************************************************** /********************************************************************************************
*
PNGU Version : 0.2a * PNGU
*
Coder : frontier * Original author: frontier (http://frontier-dev.net)
* Modified by Tantric, 2009-2010
More info : http://frontier-dev.net *
Modified by Tantric, 2009
********************************************************************************************/ ********************************************************************************************/
#include <stdio.h> #include <stdio.h>
#include <malloc.h> #include <malloc.h>
#include <gccore.h>
#include "pngu.h" #include "pngu.h"
#include "png.h" #include <png.h>
// Constants // Constants
#define PNGU_SOURCE_BUFFER 1 #define PNGU_SOURCE_BUFFER 1
#define PNGU_SOURCE_DEVICE 2 #define PNGU_SOURCE_DEVICE 2
// Prototypes of helper functions // Return codes
int pngu_info (IMGCTX ctx); #define PNGU_OK 0
int pngu_decode (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, PNGU_u32 stripAlpha); #define PNGU_ODD_WIDTH 1
void pngu_free_info (IMGCTX ctx); #define PNGU_ODD_STRIDE 2
void pngu_read_data_from_buffer (png_structp png_ptr, png_bytep data, png_size_t length); #define PNGU_INVALID_WIDTH_OR_HEIGHT 3
void pngu_write_data_to_buffer (png_structp png_ptr, png_bytep data, png_size_t length); #define PNGU_FILE_IS_NOT_PNG 4
void pngu_flush_data_to_buffer (png_structp png_ptr); #define PNGU_UNSUPPORTED_COLOR_TYPE 5
int pngu_clamp (int value, int min, int max); #define PNGU_NO_FILE_SELECTED 6
#define PNGU_CANT_OPEN_FILE 7
#define PNGU_CANT_READ_FILE 8
#define PNGU_LIB_ERROR 9
// Color types
#define PNGU_COLOR_TYPE_GRAY 1
#define PNGU_COLOR_TYPE_GRAY_ALPHA 2
#define PNGU_COLOR_TYPE_PALETTE 3
#define PNGU_COLOR_TYPE_RGB 4
#define PNGU_COLOR_TYPE_RGB_ALPHA 5
#define PNGU_COLOR_TYPE_UNKNOWN 6
// PNGU Image context struct // PNGU Image context struct
struct _IMGCTX struct _IMGCTX
@ -49,362 +59,42 @@ struct _IMGCTX
// PNGU Implementation // PNGU Implementation
IMGCTX PNGU_SelectImageFromBuffer (const void *buffer) static void pngu_free_info (IMGCTX ctx)
{ {
IMGCTX ctx = NULL; if (ctx->infoRead)
{
if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd);
if (!buffer) png_destroy_read_struct (&(ctx->png_ptr), &(ctx->info_ptr), (png_infopp)NULL);
return NULL;
ctx = malloc (sizeof (struct _IMGCTX));
if (!ctx)
return NULL;
ctx->buffer = (void *) buffer;
ctx->source = PNGU_SOURCE_BUFFER;
ctx->cursor = 0;
ctx->filename = NULL;
ctx->propRead = 0;
ctx->infoRead = 0; ctx->infoRead = 0;
}
return ctx;
} }
IMGCTX PNGU_SelectImageFromDevice (const char *filename) // Custom data provider function used for reading from memory buffers.
static void pngu_read_data_from_buffer (png_structp png_ptr, png_bytep data, png_size_t length)
{ {
IMGCTX ctx = NULL; IMGCTX ctx = (IMGCTX) png_get_io_ptr (png_ptr);
memcpy (data, ctx->buffer + ctx->cursor, length);
ctx->cursor += length;
}
if (!filename) // Custom data writer function used for writing to memory buffers.
return NULL; static void pngu_write_data_to_buffer (png_structp png_ptr, png_bytep data, png_size_t length)
ctx = malloc (sizeof (struct _IMGCTX));
if (!ctx)
return NULL;
ctx->buffer = NULL;
ctx->source = PNGU_SOURCE_DEVICE;
ctx->cursor = 0;
ctx->filename = malloc (strlen (filename) + 1);
if (!ctx->filename)
{ {
free (ctx); IMGCTX ctx = (IMGCTX) png_get_io_ptr (png_ptr);
return NULL; memcpy (ctx->buffer + ctx->cursor, data, length);
} ctx->cursor += length;
strcpy(ctx->filename, filename);
ctx->propRead = 0;
ctx->infoRead = 0;
return ctx;
} }
void PNGU_ReleaseImageContext (IMGCTX ctx) // Custom data flusher function used for writing to memory buffers.
static void pngu_flush_data_to_buffer (png_structp png_ptr)
{ {
if (!ctx) // Nothing to do here
return;
if (ctx->filename)
free (ctx->filename);
if ((ctx->propRead) && (ctx->prop.trans))
free (ctx->prop.trans);
pngu_free_info (ctx);
free (ctx);
} }
int PNGU_GetImageProperties (IMGCTX ctx, PNGUPROP *imgprop) static int pngu_info (IMGCTX ctx)
{
int res;
if (!ctx->propRead)
{
res = pngu_info (ctx);
if (res != PNGU_OK)
return res;
}
*imgprop = ctx->prop;
return PNGU_OK;
}
int PNGU_DecodeTo4x4RGBA8 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u8 default_alpha)
{
int result;
PNGU_u32 x, y, qwidth, qheight;
PNGU_u64 alphaMask;
// width and height need to be divisible by four
if ((width % 4) || (height % 4))
return PNGU_INVALID_WIDTH_OR_HEIGHT;
result = pngu_decode (ctx, width, height, 0);
if (result != PNGU_OK)
return result;
// Init some variables
qwidth = width >> 2;
qheight = height >> 2;
// Check is source image has an alpha channel
if ( (ctx->prop.imgColorType == PNGU_COLOR_TYPE_GRAY_ALPHA) || (ctx->prop.imgColorType == PNGU_COLOR_TYPE_RGB_ALPHA) )
{
// Alpha channel present, copy image to the output buffer
for (y = 0; y < qheight; y++)
for (x = 0; x < qwidth; x++)
{
int blockbase = (y * qwidth + x) << 3;
PNGU_u32 y4 = y << 2;
PNGU_u32 x16 = x << 4;
PNGU_u64 fieldA = *((PNGU_u64 *)(ctx->row_pointers[y4]+x16));
PNGU_u64 fieldB = *((PNGU_u64 *)(ctx->row_pointers[y4]+x16+8));
((PNGU_u64 *) buffer)[blockbase] =
((fieldA & 0xFF00000000ULL) << 24) | ((fieldA & 0xFF00000000000000ULL) >> 8) |
((fieldA & 0xFFULL) << 40) | ((fieldA & 0xFF000000ULL) << 8) |
((fieldB & 0xFF00000000ULL) >> 8) | ((fieldB & 0xFF00000000000000ULL) >> 40) |
((fieldB & 0xFFULL) << 8) | ((fieldB & 0xFF000000ULL) >> 24);
((PNGU_u64 *) buffer)[blockbase+4] =
((fieldA & 0xFFFF0000000000ULL) << 8) | ((fieldA & 0xFFFF00ULL) << 24) |
((fieldB & 0xFFFF0000000000ULL) >> 24) | ((fieldB & 0xFFFF00ULL) >> 8);
fieldA = *((PNGU_u64 *)(ctx->row_pointers[y4+1]+x16));
fieldB = *((PNGU_u64 *)(ctx->row_pointers[y4+1]+x16+8));
((PNGU_u64 *) buffer)[blockbase+1] =
((fieldA & 0xFF00000000ULL) << 24) | ((fieldA & 0xFF00000000000000ULL) >> 8) |
((fieldA & 0xFFULL) << 40) | ((fieldA & 0xFF000000ULL) << 8) |
((fieldB & 0xFF00000000ULL) >> 8) | ((fieldB & 0xFF00000000000000ULL) >> 40) |
((fieldB & 0xFFULL) << 8) | ((fieldB & 0xFF000000ULL) >> 24);
((PNGU_u64 *) buffer)[blockbase+5] =
((fieldA & 0xFFFF0000000000ULL) << 8) | ((fieldA & 0xFFFF00ULL) << 24) |
((fieldB & 0xFFFF0000000000ULL) >> 24) | ((fieldB & 0xFFFF00ULL) >> 8);
fieldA = *((PNGU_u64 *)(ctx->row_pointers[y4+2]+x16));
fieldB = *((PNGU_u64 *)(ctx->row_pointers[y4+2]+x16+8));
((PNGU_u64 *) buffer)[blockbase+2] =
((fieldA & 0xFF00000000ULL) << 24) | ((fieldA & 0xFF00000000000000ULL) >> 8) |
((fieldA & 0xFFULL) << 40) | ((fieldA & 0xFF000000ULL) << 8) |
((fieldB & 0xFF00000000ULL) >> 8) | ((fieldB & 0xFF00000000000000ULL) >> 40) |
((fieldB & 0xFFULL) << 8) | ((fieldB & 0xFF000000ULL) >> 24);
((PNGU_u64 *) buffer)[blockbase+6] =
((fieldA & 0xFFFF0000000000ULL) << 8) | ((fieldA & 0xFFFF00ULL) << 24) |
((fieldB & 0xFFFF0000000000ULL) >> 24) | ((fieldB & 0xFFFF00ULL) >> 8);
fieldA = *((PNGU_u64 *)(ctx->row_pointers[y4+3]+x16));
fieldB = *((PNGU_u64 *)(ctx->row_pointers[y4+3]+x16+8));
((PNGU_u64 *) buffer)[blockbase+3] =
((fieldA & 0xFF00000000ULL) << 24) | ((fieldA & 0xFF00000000000000ULL) >> 8) |
((fieldA & 0xFFULL) << 40) | ((fieldA & 0xFF000000ULL) << 8) |
((fieldB & 0xFF00000000ULL) >> 8) | ((fieldB & 0xFF00000000000000ULL) >> 40) |
((fieldB & 0xFFULL) << 8) | ((fieldB & 0xFF000000ULL) >> 24);
((PNGU_u64 *) buffer)[blockbase+7] =
((fieldA & 0xFFFF0000000000ULL) << 8) | ((fieldA & 0xFFFF00ULL) << 24) |
((fieldB & 0xFFFF0000000000ULL) >> 24) | ((fieldB & 0xFFFF00ULL) >> 8);
}
}
else
{
// No alpha channel present, copy image to the output buffer
alphaMask = (((PNGU_u64)default_alpha) << 56) | (((PNGU_u64)default_alpha) << 40) |
(((PNGU_u64)default_alpha) << 24) | (((PNGU_u64)default_alpha) << 8);
for (y = 0; y < qheight; y++)
for (x = 0; x < qwidth; x++)
{
int blockbase = (y * qwidth + x) << 3;
PNGU_u32 y4 = y << 2;
PNGU_u32 x12 = x * 12;
PNGU_u64 field64 = *((PNGU_u64 *)(ctx->row_pointers[y4]+x12));
PNGU_u64 field32 = (PNGU_u64) *((PNGU_u32 *)(ctx->row_pointers[y4]+x12+8));
((PNGU_u64 *) buffer)[blockbase] =
(((field64 & 0xFF00000000000000ULL) >> 8) | (field64 & 0xFF00000000ULL) |
((field64 & 0xFF00ULL) << 8) | ((field32 & 0xFF0000ULL) >> 16) | alphaMask);
((PNGU_u64 *) buffer)[blockbase+4] =
(((field64 & 0xFFFF0000000000ULL) << 8) | ((field64 & 0xFFFF0000ULL) << 16) |
((field64 & 0xFFULL) << 24) | ((field32 & 0xFF000000ULL) >> 8) | (field32 & 0xFFFFULL));
field64 = *((PNGU_u64 *)(ctx->row_pointers[y4+1]+x12));
field32 = (PNGU_u64) *((PNGU_u32 *)(ctx->row_pointers[y4+1]+x12+8));
((PNGU_u64 *) buffer)[blockbase+1] =
(((field64 & 0xFF00000000000000ULL) >> 8) | (field64 & 0xFF00000000ULL) |
((field64 & 0xFF00ULL) << 8) | ((field32 & 0xFF0000ULL) >> 16) | alphaMask);
((PNGU_u64 *) buffer)[blockbase+5] =
(((field64 & 0xFFFF0000000000ULL) << 8) | ((field64 & 0xFFFF0000ULL) << 16) |
((field64 & 0xFFULL) << 24) | ((field32 & 0xFF000000ULL) >> 8) | (field32 & 0xFFFFULL));
field64 = *((PNGU_u64 *)(ctx->row_pointers[y4+2]+x12));
field32 = (PNGU_u64) *((PNGU_u32 *)(ctx->row_pointers[y4+2]+x12+8));
((PNGU_u64 *) buffer)[blockbase+2] =
(((field64 & 0xFF00000000000000ULL) >> 8) | (field64 & 0xFF00000000ULL) |
((field64 & 0xFF00ULL) << 8) | ((field32 & 0xFF0000ULL) >> 16) | alphaMask);
((PNGU_u64 *) buffer)[blockbase+6] =
(((field64 & 0xFFFF0000000000ULL) << 8) | ((field64 & 0xFFFF0000ULL) << 16) |
((field64 & 0xFFULL) << 24) | ((field32 & 0xFF000000ULL) >> 8) | (field32 & 0xFFFFULL));
field64 = *((PNGU_u64 *)(ctx->row_pointers[y4+3]+x12));
field32 = (PNGU_u64) *((PNGU_u32 *)(ctx->row_pointers[y4+3]+x12+8));
((PNGU_u64 *) buffer)[blockbase+3] =
(((field64 & 0xFF00000000000000ULL) >> 8) | (field64 & 0xFF00000000ULL) |
((field64 & 0xFF00ULL) << 8) | ((field32 & 0xFF0000ULL) >> 16) | alphaMask);
((PNGU_u64 *) buffer)[blockbase+7] =
(((field64 & 0xFFFF0000000000ULL) << 8) | ((field64 & 0xFFFF0000ULL) << 16) |
((field64 & 0xFFULL) << 24) | ((field32 & 0xFF000000ULL) >> 8) | (field32 & 0xFFFFULL));
}
}
// Free resources
free (ctx->img_data);
free (ctx->row_pointers);
// Success
return PNGU_OK;
}
int PNGU_EncodeFromRGB (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride)
{
png_uint_32 rowbytes;
PNGU_u32 y;
// Erase from the context any readed info
pngu_free_info (ctx);
ctx->propRead = 0;
// Check if the user has selected a file to write the image
if (ctx->source == PNGU_SOURCE_BUFFER);
else if (ctx->source == PNGU_SOURCE_DEVICE)
{
// Open file
if (!(ctx->fd = fopen (ctx->filename, "wb")))
return PNGU_CANT_OPEN_FILE;
}
else
return PNGU_NO_FILE_SELECTED;
// Allocation of libpng structs
ctx->png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!(ctx->png_ptr))
{
if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd);
return PNGU_LIB_ERROR;
}
ctx->info_ptr = png_create_info_struct (ctx->png_ptr);
if (!(ctx->info_ptr))
{
png_destroy_write_struct (&(ctx->png_ptr), (png_infopp)NULL);
if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd);
return PNGU_LIB_ERROR;
}
if (ctx->source == PNGU_SOURCE_BUFFER)
{
// Installation of our custom data writer function
ctx->cursor = 0;
png_set_write_fn (ctx->png_ptr, ctx, pngu_write_data_to_buffer, pngu_flush_data_to_buffer);
}
else if (ctx->source == PNGU_SOURCE_DEVICE)
{
// Default data writer uses function fwrite, so it needs to use our FILE*
png_init_io (ctx->png_ptr, ctx->fd);
}
// Setup output file properties
png_set_IHDR (ctx->png_ptr, ctx->info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
// Allocate memory to store the image in RGB format
rowbytes = width * 3;
if (rowbytes % 4)
rowbytes = ((rowbytes >>2) + 1) <<2; // Add extra padding so each row starts in a 4 byte boundary
ctx->img_data = malloc(rowbytes * height);
memset(ctx->img_data, 0, rowbytes * height);
if (!ctx->img_data)
{
png_destroy_write_struct (&(ctx->png_ptr), (png_infopp)NULL);
if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd);
return PNGU_LIB_ERROR;
}
ctx->row_pointers = malloc (sizeof (png_bytep) * height);
memset(ctx->row_pointers, 0, sizeof (png_bytep) * height);
if (!ctx->row_pointers)
{
png_destroy_write_struct (&(ctx->png_ptr), (png_infopp)NULL);
if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd);
return PNGU_LIB_ERROR;
}
for (y = 0; y < height; ++y)
{
ctx->row_pointers[y] = buffer + (y * rowbytes);
}
// Tell libpng where is our image data
png_set_rows (ctx->png_ptr, ctx->info_ptr, ctx->row_pointers);
// Write file header and image data
png_write_png (ctx->png_ptr, ctx->info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
// Tell libpng we have no more data to write
png_write_end (ctx->png_ptr, (png_infop) NULL);
// Free resources
free (ctx->img_data);
free (ctx->row_pointers);
png_destroy_write_struct (&(ctx->png_ptr), &(ctx->info_ptr));
if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd);
// Success
return ctx->cursor;
}
int PNGU_EncodeFromGXTexture (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride)
{
int res;
PNGU_u32 x,y, tmpy1, tmpy2, tmpyWid, tmpxy;
unsigned char * ptr = (unsigned char*)buffer;
unsigned char * tmpbuffer = (unsigned char *)malloc(width*height*3);
memset(tmpbuffer, 0, width*height*3);
png_uint_32 offset;
for(y=0; y < height; y++)
{
tmpy1 = y * 640*3;
tmpy2 = y%4 << 2;
tmpyWid = (((y >> 2)<<4)*width);
for(x=0; x < width; x++)
{
offset = tmpyWid + ((x >> 2)<<6) + ((tmpy2+ x%4 ) << 1);
tmpxy = x * 3 + tmpy1;
tmpbuffer[tmpxy ] = ptr[offset+1]; // R
tmpbuffer[tmpxy+1] = ptr[offset+32]; // G
tmpbuffer[tmpxy+2] = ptr[offset+33]; // B
}
}
res = PNGU_EncodeFromRGB (ctx, width, height, tmpbuffer, stride);
free(tmpbuffer);
return res;
}
int pngu_info (IMGCTX ctx)
{ {
png_byte magic[8]; png_byte magic[8];
png_uint_32 width; png_uint_32 width;
@ -604,7 +294,7 @@ int pngu_info (IMGCTX ctx)
return PNGU_OK; return PNGU_OK;
} }
int pngu_decode (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, PNGU_u32 stripAlpha) static int pngu_decode (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, PNGU_u32 stripAlpha)
{ {
png_uint_32 rowbytes; png_uint_32 rowbytes;
png_uint_32 i, propImgHeight; png_uint_32 i, propImgHeight;
@ -679,48 +369,313 @@ int pngu_decode (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, PNGU_u32 stripAlph
return PNGU_OK; return PNGU_OK;
} }
void pngu_free_info (IMGCTX ctx) static inline PNGU_u32 coordsRGBA8(PNGU_u32 x, PNGU_u32 y, PNGU_u32 w)
{ {
if (ctx->infoRead) return ((((y >> 2) * (w >> 2) + (x >> 2)) << 5) + ((y & 3) << 2) + (x & 3)) << 1;
}
static PNGU_u8 * PNGU_DecodeTo4x4RGBA8 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, PNGU_u8 default_alpha)
{
PNGU_u8 *dst;
PNGU_u32 x, y, offset;
png_byte *pixel;
if (pngu_decode (ctx, width, height, 0) != PNGU_OK)
return NULL;
PNGU_u32 newWidth = width;
if(newWidth%4) newWidth += (4-newWidth%4);
PNGU_u32 newHeight = height;
if(newHeight%4) newHeight += (4-newHeight%4);
int len = (newWidth * newHeight) << 2;
if(len%32) len += (32-len%32);
dst = memalign (32, len);
if(!dst)
return NULL;
for (y = 0; y < newHeight; y++)
{
for (x = 0; x < newWidth; x++)
{
offset = coordsRGBA8(x, y, newWidth);
if(y >= height || x >= width)
{
dst[offset] = 0;
dst[offset+1] = 255;
dst[offset+32] = 255;
dst[offset+33] = 255;
}
else
{
if (ctx->prop.imgColorType == PNGU_COLOR_TYPE_GRAY_ALPHA ||
ctx->prop.imgColorType == PNGU_COLOR_TYPE_RGB_ALPHA)
{
pixel = &(ctx->row_pointers[y][x*4]);
dst[offset] = pixel[3]; // Alpha
dst[offset+1] = pixel[0]; // Red
dst[offset+32] = pixel[1]; // Green
dst[offset+33] = pixel[2]; // Blue
}
else
{
pixel = &(ctx->row_pointers[y][x*3]);
dst[offset] = default_alpha; // Alpha
dst[offset+1] = pixel[0]; // Red
dst[offset+32] = pixel[1]; // Green
dst[offset+33] = pixel[2]; // Blue
}
}
}
}
// Free resources
free (ctx->img_data);
free (ctx->row_pointers);
DCFlushRange(dst, len);
return dst;
}
IMGCTX PNGU_SelectImageFromBuffer (const void *buffer)
{
IMGCTX ctx = NULL;
if (!buffer)
return NULL;
ctx = malloc (sizeof (struct _IMGCTX));
if (!ctx)
return NULL;
ctx->buffer = (void *) buffer;
ctx->source = PNGU_SOURCE_BUFFER;
ctx->cursor = 0;
ctx->filename = NULL;
ctx->propRead = 0;
ctx->infoRead = 0;
return ctx;
}
IMGCTX PNGU_SelectImageFromDevice (const char *filename)
{
IMGCTX ctx = NULL;
if (!filename)
return NULL;
ctx = malloc (sizeof (struct _IMGCTX));
if (!ctx)
return NULL;
ctx->buffer = NULL;
ctx->source = PNGU_SOURCE_DEVICE;
ctx->cursor = 0;
ctx->filename = malloc (strlen (filename) + 1);
if (!ctx->filename)
{
free (ctx);
return NULL;
}
strcpy(ctx->filename, filename);
ctx->propRead = 0;
ctx->infoRead = 0;
return ctx;
}
void PNGU_ReleaseImageContext (IMGCTX ctx)
{
if (!ctx)
return;
if (ctx->filename)
free (ctx->filename);
if ((ctx->propRead) && (ctx->prop.trans))
free (ctx->prop.trans);
pngu_free_info (ctx);
free (ctx);
}
int PNGU_GetImageProperties (IMGCTX ctx, PNGUPROP *imgprop)
{
int res;
if (!ctx->propRead)
{
res = pngu_info (ctx);
if (res != PNGU_OK)
return res;
}
*imgprop = ctx->prop;
return PNGU_OK;
}
PNGU_u8 * DecodePNG(const PNGU_u8 *src, int * width, int * height)
{
PNGUPROP imgProp;
IMGCTX ctx = PNGU_SelectImageFromBuffer(src);
PNGU_u8 *dst = NULL;
if(!ctx)
return NULL;
if(PNGU_GetImageProperties(ctx, &imgProp) == PNGU_OK)
{
dst = PNGU_DecodeTo4x4RGBA8 (ctx, imgProp.imgWidth, imgProp.imgHeight, 255);
*width = imgProp.imgWidth;
*height = imgProp.imgHeight;
}
PNGU_ReleaseImageContext (ctx);
return dst;
}
int PNGU_EncodeFromRGB (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride)
{
png_uint_32 rowbytes;
PNGU_u32 y;
// Erase from the context any readed info
pngu_free_info (ctx);
ctx->propRead = 0;
// Check if the user has selected a file to write the image
if (ctx->source == PNGU_SOURCE_BUFFER);
else if (ctx->source == PNGU_SOURCE_DEVICE)
{
// Open file
if (!(ctx->fd = fopen (ctx->filename, "wb")))
return PNGU_CANT_OPEN_FILE;
}
else
return PNGU_NO_FILE_SELECTED;
// Allocation of libpng structs
ctx->png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!(ctx->png_ptr))
{ {
if (ctx->source == PNGU_SOURCE_DEVICE) if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd); fclose (ctx->fd);
return PNGU_LIB_ERROR;
png_destroy_read_struct (&(ctx->png_ptr), &(ctx->info_ptr), (png_infopp)NULL);
ctx->infoRead = 0;
}
} }
// Custom data provider function used for reading from memory buffers. ctx->info_ptr = png_create_info_struct (ctx->png_ptr);
void pngu_read_data_from_buffer (png_structp png_ptr, png_bytep data, png_size_t length) if (!(ctx->info_ptr))
{ {
IMGCTX ctx = (IMGCTX) png_get_io_ptr (png_ptr); png_destroy_write_struct (&(ctx->png_ptr), (png_infopp)NULL);
memcpy (data, ctx->buffer + ctx->cursor, length); if (ctx->source == PNGU_SOURCE_DEVICE)
ctx->cursor += length; fclose (ctx->fd);
return PNGU_LIB_ERROR;
} }
// Custom data writer function used for writing to memory buffers. if (ctx->source == PNGU_SOURCE_BUFFER)
void pngu_write_data_to_buffer (png_structp png_ptr, png_bytep data, png_size_t length)
{ {
IMGCTX ctx = (IMGCTX) png_get_io_ptr (png_ptr); // Installation of our custom data writer function
memcpy (ctx->buffer + ctx->cursor, data, length); ctx->cursor = 0;
ctx->cursor += length; png_set_write_fn (ctx->png_ptr, ctx, pngu_write_data_to_buffer, pngu_flush_data_to_buffer);
} }
else if (ctx->source == PNGU_SOURCE_DEVICE)
// Custom data flusher function used for writing to memory buffers.
void pngu_flush_data_to_buffer (png_structp png_ptr)
{ {
// Nothing to do here // Default data writer uses function fwrite, so it needs to use our FILE*
png_init_io (ctx->png_ptr, ctx->fd);
} }
// Function used in YCbYCr to RGB decoding // Setup output file properties
int pngu_clamp (int value, int min, int max) png_set_IHDR (ctx->png_ptr, ctx->info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
// Allocate memory to store the image in RGB format
rowbytes = width * 3;
if (rowbytes % 4)
rowbytes = ((rowbytes >>2) + 1) <<2; // Add extra padding so each row starts in a 4 byte boundary
ctx->img_data = malloc(rowbytes * height);
memset(ctx->img_data, 0, rowbytes * height);
if (!ctx->img_data)
{ {
if (value < min) png_destroy_write_struct (&(ctx->png_ptr), (png_infopp)NULL);
value = min; if (ctx->source == PNGU_SOURCE_DEVICE)
else if (value > max) fclose (ctx->fd);
value = max; return PNGU_LIB_ERROR;
}
return value;
ctx->row_pointers = malloc (sizeof (png_bytep) * height);
memset(ctx->row_pointers, 0, sizeof (png_bytep) * height);
if (!ctx->row_pointers)
{
png_destroy_write_struct (&(ctx->png_ptr), (png_infopp)NULL);
if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd);
return PNGU_LIB_ERROR;
}
for (y = 0; y < height; ++y)
{
ctx->row_pointers[y] = buffer + (y * rowbytes);
}
// Tell libpng where is our image data
png_set_rows (ctx->png_ptr, ctx->info_ptr, ctx->row_pointers);
// Write file header and image data
png_write_png (ctx->png_ptr, ctx->info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
// Tell libpng we have no more data to write
png_write_end (ctx->png_ptr, (png_infop) NULL);
// Free resources
free (ctx->img_data);
free (ctx->row_pointers);
png_destroy_write_struct (&(ctx->png_ptr), &(ctx->info_ptr));
if (ctx->source == PNGU_SOURCE_DEVICE)
fclose (ctx->fd);
// Success
return ctx->cursor;
}
int PNGU_EncodeFromGXTexture (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride)
{
int res;
PNGU_u32 x,y, tmpy1, tmpy2, tmpyWid, tmpxy;
unsigned char * ptr = (unsigned char*)buffer;
unsigned char * tmpbuffer = (unsigned char *)malloc(width*height*3);
memset(tmpbuffer, 0, width*height*3);
png_uint_32 offset;
for(y=0; y < height; y++)
{
tmpy1 = y * 640*3;
tmpy2 = y%4 << 2;
tmpyWid = (((y >> 2)<<4)*width);
for(x=0; x < width; x++)
{
offset = tmpyWid + ((x >> 2)<<6) + ((tmpy2+ x%4 ) << 1);
tmpxy = x * 3 + tmpy1;
tmpbuffer[tmpxy ] = ptr[offset+1]; // R
tmpbuffer[tmpxy+1] = ptr[offset+32]; // G
tmpbuffer[tmpxy+2] = ptr[offset+33]; // B
}
}
res = PNGU_EncodeFromRGB (ctx, width, height, tmpbuffer, stride);
free(tmpbuffer);
return res;
} }

46
source/ngc/pngu.h
View File

@ -1,38 +1,15 @@
/******************************************************************************************** /********************************************************************************************
*
PNGU Version : 0.2a * PNGU
*
Coder : frontier * Original author: frontier (http://frontier-dev.net)
* Modified by Tantric, 2009-2010
More info : http://frontier-dev.net *
Modified by Tantric, 2009
********************************************************************************************/ ********************************************************************************************/
#ifndef __PNGU__ #ifndef __PNGU__
#define __PNGU__ #define __PNGU__
// Return codes
#define PNGU_OK 0
#define PNGU_ODD_WIDTH 1
#define PNGU_ODD_STRIDE 2
#define PNGU_INVALID_WIDTH_OR_HEIGHT 3
#define PNGU_FILE_IS_NOT_PNG 4
#define PNGU_UNSUPPORTED_COLOR_TYPE 5
#define PNGU_NO_FILE_SELECTED 6
#define PNGU_CANT_OPEN_FILE 7
#define PNGU_CANT_READ_FILE 8
#define PNGU_LIB_ERROR 9
// Color types
#define PNGU_COLOR_TYPE_GRAY 1
#define PNGU_COLOR_TYPE_GRAY_ALPHA 2
#define PNGU_COLOR_TYPE_PALETTE 3
#define PNGU_COLOR_TYPE_RGB 4
#define PNGU_COLOR_TYPE_RGB_ALPHA 5
#define PNGU_COLOR_TYPE_UNKNOWN 6
#ifdef __cplusplus #ifdef __cplusplus
extern "C" { extern "C" {
#endif #endif
@ -79,9 +56,8 @@ IMGCTX PNGU_SelectImageFromDevice (const char *filename);
// Frees resources associated with an image context. Always call this function when you no longer need the IMGCTX. // Frees resources associated with an image context. Always call this function when you no longer need the IMGCTX.
void PNGU_ReleaseImageContext (IMGCTX ctx); void PNGU_ReleaseImageContext (IMGCTX ctx);
/**************************************************************************** /****************************************************************************
* Miscelaneous * * Miscellaneous *
****************************************************************************/ ****************************************************************************/
// Retrieves info from selected PNG file, including image dimensions, color format, background and transparency colors. // Retrieves info from selected PNG file, including image dimensions, color format, background and transparency colors.
@ -91,10 +67,7 @@ int PNGU_GetImageProperties (IMGCTX ctx, PNGUPROP *fileproperties);
* Image conversion * * Image conversion *
****************************************************************************/ ****************************************************************************/
// Expands selected image into a 4x4 tiled RGBA8 buffer. You need to specify context, image dimensions, PNGU_u8 * DecodePNG(const PNGU_u8 *src, int *width, int *height);
// destination address and default alpha value, which is used if the source image doesn't have an alpha channel.
int PNGU_DecodeTo4x4RGBA8 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u8 default_alpha);
int PNGU_EncodeFromRGB (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride); int PNGU_EncodeFromRGB (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride);
int PNGU_EncodeFromGXTexture (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride); int PNGU_EncodeFromGXTexture (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride);
@ -103,4 +76,3 @@ int PNGU_EncodeFromGXTexture (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void
#endif #endif
#endif #endif